Fitting cubic spline on 2D array

[Priya Singh]

Hello all,

Can anyone tell me how can I get the functional form of the fitted cubic spline
function on to my 2D array? For eg. when we fit the Gaussian on to an array so we have the functional form with the parameters best fitted to my data likewise how can we do for the cubic spline function? Actually, I want to express my array as

A = summation_i,j(C_ij * value_ij)

Where i and j are the array indices of my 2D array and C_ij should be the functional form of the cubic spline and value_ij is the value of A at that ij index.

Can anyone has an idea, it's very urgent. Any help will be of great use to me.

Thanks in advance!

Regards,
Priya